This is game development series that has been going for a long time, they are making a game called Elysian Shadows which is a "next gen RPG". If you are interested in game development watch the series as you learn a lot about the game creation process. The team are creating their own game engine and tool kit, the engine runs on pretty much every platform which is amazing to retrospect, that's even more that unity!. they gave it away if you backed their kickstarter campaign. check them out.

You can create games with libgdx and also graphics simulations using very simple code or advanced if you want to by using glsl shaders, here is an example of libgdx working with Box2d lights, I made this some time ago.

Destiny, Forza Horizon 2, Evolve, Assassin's Creed Unity, Dragon Age Inquisition, Sunset Overdrive, Ori and the Blind Forest, Halo 5 & TMCC, Inside, Scalebound, Shadow of Mordor, Elders Scroll Online, and No Man's Sky. I still need to see Sony's Conference, so there is a chance that more games will be added to the list.